VS Code 1.139 Ships Dev Container Agent Sessions and Cuts Session-List Load Times Up to 12x
Visual Studio Code 1.139 extends Dev Container agent sessions to remote hosts and speeds up large agent session lists by up to 12x, Microsoft says.
Overview
Microsoft released Visual Studio Code 1.139 as a stable build on September 23, 2026, speeding up how the editor loads and refreshes large agent session lists and extending Dev Container support for AI agents to remote projects. The release’s tagged entry on GitHub confirms the same date, showing the 1.139.0 tag published September 23 at 10:32 UTC. According to VS Code’s release notes, “this release makes large agent session lists faster, extends Dev Container support to remote projects, and improves everyday editing.”
What We Know
The editor’s agent session list now loads and refreshes faster for users with many saved sessions. Per VS Code’s release notes, “VS Code loads and refreshes large agent session lists faster. The agent host keeps lightweight session and chat metadata in a central catalog instead of opening every conversation database each time the list is built.” Microsoft’s numbers show first session listing after launch improving from 1.3 seconds to 0.1 seconds, about 12x faster, and list refresh improving from 0.6 seconds to 0.15 seconds, about 4x faster, according to the release notes.
Dev Container sessions, previously limited to local folders, now extend to remote setups. VS Code’s release notes state: “Let agents build and test your remote project with the right tools and dependencies, without duplicating toolchain setup on your laptop or the remote host. This release extends Dev Container sessions from local folders to projects on SSH, Tunnel, and WSL hosts.”
The update also adds a denser way to view multiple agent sessions at once. According to the release notes, users can “fit more sessions in the sessions list by enabling Compact View in the sessions list view of the Agents Window,” where “compact rows show the session title at rest and reveal workspace details when you hover over or focus the row.”
On the editing side, VS Code 1.139 adds visual cues for wrapped lines. The release notes describe the feature: “Display word wrap indicators to make wrapped lines easier to identify. An arrow at the word wrap column on the right side of the editor indicates that a line wraps.” Bracket handling also changes: “VS Code avoids inserting duplicate closing brackets when you type an opening bracket. If a matching closing bracket exists, VS Code uses it. Otherwise, VS Code inserts one,” per the release notes.
The release follows VS Code 1.132, published in August 2026, which introduced the editor’s cross-window Agent Host and on-device multilingual dictation. VS Code 1.139 builds on that same agent-session infrastructure, this time focused on load-time performance and remote Dev Container reach rather than new agent-host capabilities.
What We Don’t Know
Microsoft’s release notes do not disclose how many users maintain the large session counts needed to notice the reported 12x and 4x speedups, nor do they say whether Compact View will become the default sessions display in a future release.
Analysis
The 1.139 release keeps VS Code’s pattern of monthly updates that refine, rather than expand, its agent-session tooling. Where 1.132 added new agent-host surfaces in August, 1.139 concentrates on making the existing session infrastructure faster and more portable to remote development setups, alongside smaller, unrelated editing refinements in word wrap and bracket handling.